I'm not much of a CAS shooter but this is my understanding.
Rifles are limited to designs of 1899 and earlier which eliminates the 348 as a factory option.
If that was the case people wouldn't be allowed to use Henry Big Boys, a brand new 21st century
design. Unfortunately, Henry somehow got an exception for the ugly things.
But you can't use a .348. Or a .358 Win Mag.